Ventilated buffing wheel



Patented Mar. 8, 1938i UNITED STATES vl'aa'rrzia'l OFFICE 2,110,494 vENTmA'rED'BurFING WHEEL .v Harry Zimmerman, Toronto,4 ntario Canada Application February 16, 1937, Serial No. 126,014 claims.l (c1. 51-19'3) My invention relates to improvements in ventilated bung wheels of the type disclosed in my United States Patent application, Serial No. ,68,403, filed March 12th, 1936, wherein fan members are positioned at the sides of a bufling wheel to rotate therewith and inject air into the central portion of the wheel from where it passes outwardly between either the bufng sections or plies of the wheel to dissipate frictionally generated buiiing heat.

The object-of my present invention is to provide an improved means for securing the fan members and buing wheel sections in assembly whereby the air draft receiving orifices in the central portions of the bufllng wheel sections or plies are retained in their proper alignment.

To attain the object of my invention, I provide the fan members With a plurality of pins which are directed inwardly about the arbour holeA of y the buing wheel and contained within the pearshaped air draft receiving orifices as disclosed in my United States Patent application, Serial Another object of my invention is toprovide a 5 pair of clamping iianges in lieu of 4fan members in cases where it is desired to use a non-ventilated buing wheel, and to provide such iiange mem- -bers with pins which pass through orices in the bumng wheel in substantially the same manner 0 as the pins on the ian members which project through the air draft receiving orifices in avventilated builing wheel.

A further object of myinvention is to so design the fan members that each is furnished with l5 a plurality of pins and a plurality of pin receiving orices, the orifices in one fan member receiving the outer ends of the pins ofthe other fan member, and another object of my invention is to proyide a fan member construction wherein the pinsv i0 are rigidly secured against accidental displacement and wherein longeror shorter pins can be readily substituted in a fan member if so desired. With these and other objects in view, my in vention consists in the provision of a ventilated a bufiing wheel nstructed and arranged all as vhereinafter more particularly described and illustrated in the 'accompanying drawings in/y which,

50 Figure 1 is a perspective view of a pair, of

fan members apart from a bufiing wheel.

Figure 2 is a perspective view of a buing wheel adapted to receive a pair of fan members as illustrated in Figure 1. f

55 Figure 3 is a cross-sectional view through a bufng wheel assembly, the outer periphery of the wheel being broken away.

Figure 4 is asimilar view to Figure 3 showing an alternative construction wherein the pins do not extend from fan member to ian member, and 5 also showing the-use of separator discs positioned between the bufling wheel sections. v

Figure 5 is a cross-sectional view through a wheel, such.section being taken through the line 5 5., Figure 3. 10

Figure 6 is a. plan view of one of the' separator discs as incorporated in my assemlbly shown in Figure 4.

Figure 7 is a plan view of an alternative form of separator disc construction.

Figure 8 is a reducedy cross-sectional view through a buiing wheel section showing such section made up of a plurality of sector shaped pieces arranged around the arbour hole and pierced by my pins, and 2'0 Figure 9 is a reduced side elevational view of a pair of builing wheel engaging iianges provided with my pins but not provided with fan blades and adapted to be used in connection with a. nonventilated buiiing wheel as shown in Figure 8. 25

Like characters of reference indicate corresponding parts in the diierent -views of the drawings.

The bufiing Wheel'as described in my pending application, Serial No. 68,403, consists of a pluv rality of sections or plies of buing fabric which are assembledto form the buiing wheel, and which are pierced with a plurality of oriilces arranged around thearbour hole of the wheel for the admittance of an air draft. y In my present -applicatiom'Figures V-2 and 3I show the buing wheel as made up of a plurality of sections l which are suitably thickened at their central portions 2 and pierced by a plurality of substantially pear-shaped oriilces 3 arranged 40 around the central arbour holes 4. Thesections are carried upon a bufng lathe spindle 25, as is standard practice. By thickening the central portions 2 of the sections, Athe outer peripheral portions of the sections are spaced apart a slight degree to permit air injected into the orifices I to pass outwardly from'the wheel between the sections I. In the case of a loose buff, wherein the plies of material 'that form the wheel are not sewn together attheir outer portions, the injected air draft passesv outwardly between the plies.

The injectedair draft is supplied by apair of fan members which are also carried upon the builing lathe spindle and positioned at the sides sist oi'fa hub l having a. centralV spindle receiving orince ating Ii'ronithe` hub vandliaving their outer ends vmlthejinnerjface offa ringo! which sur.

' In` order to obtain ythe desired results from my bmng wheelA assembly, the airdraft voriices'3 A in thesectlonsor plies must be retained in alignment so that the injectedY air may freely pass through the wheel and out between Ithe sections or plies. If the 4orices 3 vwere not retained in proper "alignment with one another, the solid portion o! one section might conceivably register with an oriiice in an adjacent section, whereby the air draft injected into such orice would be blocked by the section which was out of alignment. p Y

To overcome any possibility of the orifices fin the sections moving out of. alignment and also to facilitate the assembly of the sections into a wheel, I provide each of the fan members with a plurality of pins 9 which'extend lfrom, the inner. faces of the hubs 5 through theoriice's 3 in the bufiing wheel sections. The pins 9 are arranged aroundthe arbour holes '6, and as illustrated in Figure `1*, each fan member carries. three equidistantly spaced, apart pins and is also pierced by three similarly arranged orifices .I0 which receive the outer ends of the pins of the opposite fan member, as illustrated in Figure 3.` 'I'he formed with countersunk pins are positioned to be contained within the inner portions I I ofthe pear-shaped orifices 3, as illustrated in'Figure 5, and are of such a diameter thatthey snugly fit in such portions II of the oriices 3 and d o not obstruct the passage of air through themajor portions of the'oriilces.'

When the `sections and fan members are assembled, the pins retain the sections against independent movement..

The fan members can be constructed of metal, or of a material such 'as rubber, and in practice I have formed them of moulded it is desirable to have the pins 9 ed upon thehubs 5, and as such hubs 5 receive the tightening pressure of the nut I 2bn the lathe spindle 25, I provide steel plates I3 on the outer faces of the hubs. The plates I3 are pierced by the orifices Il) and also carry the inner ends oi' the pins 9. Upon reference to Figure 3 it will be seen that the plates I3 are each orifices Il i` which the ends I5 of the pins 9 are riveted.

`iices I4 and the ends I5 of the pins are so arunder the drawing up pressure of the nut I2 as.

-butllng wheel is used that ranged in proportion tothe diameter of the pins that when the ends of the pins areriveted in place, the pins are tightly secured to the plates. The-three pins on a plate I3 are inserted through three orices I6 in a hub 5 and the plate I3 secured to the hub by two or more screws I1 which pass through the plate into the hub.

The plates I3, being .made of steel, do not out would be the case if the nut was bearing against the aluminium hub 5, and also if it is desired to use longer or shorter pins 9, they can be readily removed from the hub as a group by taking out the screws II` andv pulling the plate I3 away from the hub 5.` A new plate I3 carrying replace- 4 ment pins is thenA repositioned upon the hub. As the p in end receiving orifices I0 extend right through the hubsv 5 and plates I3, it will be understood that in cases where a relatively thin the ends of the pins con- 3,, and a plurality of A'fan blades 'I radlaluminium. As l securely mount e oriwill extend right through the orioea Il project outwardly from the plate I3;

In Figure 4, I show a"n alternative vconstruction wherein short pins Il are furnished-in lieu of the longer pins 3. The pins I3 are provided of such a length that they xwill extend more than half way into a wheel of average thickness.

and

Thus the pins on one fan member will project into the adjacent half of the wheel and the pins on the other fan member project into the other half of the wheel. In this construction the' hubs l and plates I3 carrythe pins I3 but are not provided with the pin end receiving orifices' Il. 'Ihe assembly in. Figure 4 shows the use of several bumng sections I3 which are not thickened at their centers as is the case with the sections- I shown in Flgure43.

To space apart theA sections I3( I furnish a number of separator discs 20 which are positioned between the sectionstospace them apart and thus provide the air passages between the sections. 'I'he discs shown in Figure 4` are each of the same `form asthe wherein the disc is formed with receiving arbour hole 2I and six peripherally arranged orifices 22 through-which either, the pins 9 or the pins I8 extend. In Figure 7, I show disc shown in Figure 6' a central spindle an alternative form of disc 23 having sixv substantially V-shaped pin-receiving slots 2l in its periphery. These slots have substantially the same contour as the inner portions II of the orices 3 in the sections, and inthis constructicn it is'possible to have the discs 23 of greater diameter than is the case with the discs 23, as the open ends of the slots 24 do not obstruct the free passage of air through the wheel. The discs 20 and 23 can be made of any desirable material, either still or ilaccid. l In Figure 8, I show a hurling wheel section 26 VIliade up of aplurality of sector shaped portions 21 which are arranged arounda central arbour hole 23. In order to retain such an assembly in position, I can use a pair of iianges 29 and "auch as illustrated in Figure 9, wherein the an'ge 23 is provided with a plurality of pins 3l which project through orifices 32 in the sectors. 'Ihe pins 3I enter orifices 33 provided in the flange 30. Alternatively the flanges 29 and 30 can be each provided with a set of pins in the same manner as already described in regard to the fan member. The pins 3| passing through the oriilces 32 retain the sectors 21 lagainst any outwardV centrifugal movement when the but! is in operation. The sectors 21 are also sewn to circular discs of fabric which are included in the buil. section assembly. ,The ilanges 29 and 30 are, of course, alsopierced with arbour holes 34 for the reception .of the bufllng lathe spindle. The nut I2 clamps against one of the flanges` as is standard practice.

From the foregoing description it-will be apparent that I have provided a very simple and practical construction for retaining my draft creating and although I have shown a air inlet orifices positioned around and 'spaced positioned to be rotatable in unison with the air inlet orifices, and a plurality o! pins projecting the buillng wheel and contained within the apex from the fan member hub and contained within portions of the air inlet orices adjacent to the the arbourhole of the buing wheel. .5. A ventilated bumng Wheel Pierced with an "able in unison therewith, fan member hubs part- .a,11 o,4o4 l 3 arbour hole in lthe hub, each o f the hubs also fan member hub oppositely Positioned t0 the fan having a plurality of orlilces arranged around the member hub from which they' project.

arbour hole and adapted to receive the outery ,4. Aventilated buiiing wheel pierced/'with an ends ofthe pins of the'other fan member. `arbour hole and also pierced with a plurality of 2. A ventilatedv bumng wheel pierced with an substantially triangular shaped air inlet orices 5 arbour hole and also pierced with a plurality of spaced around the arbour hole, a fan member away from the arbour hole,' a i'a'n member posibuillng wheel, a fan me ber hub partly .overtioned to be rotatable inunison with the buillng lapping the air inlet oriiices, and a plurality of wheel, a fan member hub partly overlapping the pins projecting from the fan member hub into 10 the portions of the air inlet oriiices adjacent to arbOllr hole 0f the bufng Wheel.

3 A ventilated humus .wheel pierced with an arbour hole andalso pierced with a plurality of 15 arbour holeand also pierced with a plurality of an' inlet minces Positioned around and spaced v orices arranged around the arbourhole and z away from the arbour hole" a.imu1a'r wheel spaced away therefrom a pair of fan members rpg gember lcsfondbt rotae inhunisiin y y e uflingwee an ngo suc a positioned at the sides of the wheel to be mt'at" ameter as to partly overlap the air inlet orifices, 20 and a plurality of pins-projecting from the oriy 1y overlapping the a inlet ormces' a plurality of ilce overlapping portion ofthe wheel clamping Pins Pmlecng from each fan member hub member and contained within the portions of the through thev 901110115 0f the orifices adjacent t0 air inlet orifices adjacent to the arbour hole oi' -l the arbour hole in thebuiling wheel and having the bufnng wheel, 4 25 their outer ends contained within orifices in the l v HARRY zlMMERM-AN. 

